Internal-combustion-engine timer



Dec.-A .29, 1925 1,567,930

F. E, EMERT Filed August 1, 1924 Patented Dec. 29, 1925.

UNITED STATES FRANKLIN E. EMERI, OF YOUNGDALE, PENNSYLVANIA.

NTERNAL-COMBUSTION-ENGINE TIMER.

Application filed August 1 To all Iwhom t may concer/i Be it known that Fnixinniu lll. Ermua', a citizen of the United States ot America, residing at Youngdale, in the county ot Clinton and Stato oi' Pennsylvania, has invented new and useful improvements in internal- Combustion-Engine Timers, oi: which vthe following is a specilication. g

The purpose of the invention primarily to provide a timer with a moving contact, the lite of which will be substantially the same as that ot the timer itself or ot the car on which the device is used, and to arrange such moving contact so tant it will not be subject to chattering and so that it may be automatically fed to compensate :tor wear due to use.

lith this purpose in view, the invention consists in the construction and combii'iatiou of parts of which a preferred embodiment is illustrated in the accompanying drawings, wherein:

Figure l is an elevational view, partly broken away, illustrating the invention.

Figure 2 is a side elevational view, partly in section, of the timer head detached.

Figure 8 is a vertical sectional view oi' the structure of Figure 2 in the plane oi: the axis of the brush.

Figure l is an edge elevational view ot the structure of Figure 2.

Figure 5 is a sectional view on the plane indicated by the line 5 5 of Figure 2.

The moving contact consists or" a metal brush l traversing the contacts 2 of the stationary member of the timer. The brush is carried by the rotary head l which is mounted on the cam shaft 5, the head being provided with a hub 6 for connection 'to the cam shaft. The brush occupies the position of a chord and is preferably cross sectionally angular as shown, being slidably mounted in a slide bearing cross sectionally conforming to the cross sectional contour of the brush and provided interiorly with spaced ribs 8 on which the brush slides and which reduces the friction to a minimum.

In order that the brush may be the full length of the chord which it defines and yet be yieldingly impelled toward the contacts 2, a reel is provided at the forward end of the brush consisting of a grooved pulley 9 on which a strap l0 reels, one end oft the strap being connected to the pulley, as oy a pin ll engaging slots l2 formed in the op- 15324. Serial No. 729,641.

posite ilauges of the pulley. One end oi thc strap is connected to the pin and the remaining end is formed with an eye let engaging a lateral pin mounted on the brush near the rear end oi the latter and projecting through slot 15 in the slide bearing. fis the pulley rotates, the strap is rec-led on the same and the brush advanced, tlv pull being always 'from the rear end oi' th brush.

lu order to provide for the rotation of the pulley, the latter is formed with a hub portion l? grooved, as at '18, for the reception oi a liat spiral spring l), one end of which connected with the hub and the other engag with a pin 2O mounted on the primer head. The spring tending to unwind, tends to rotate. the Willey in a direction to reel the strap thereon and therefore advance the brush toward the stationary contact with which it is held yieldingly in engagement by the spring 19.

rlhe brush being offset from the center of the head, its relation with the stationary contact is tangential and thus the chattering incident to a radial brush is eliminated. lso, the relatively7 great length of the slide bearing and the arrangement of the means lior impelling the brush provides for the use of a brush the full length of the bearing and that provides another insurance against any tendency to cause chattering.

rlhe rotary head is locked on the cam shaft by means of a radial pin 2l and when the latter is seated, the exposed end is covered by a latch plate 22 pivotally mounted on the angular plate 23 carried by the rotary head.

In order to protect the strap and the pulley, a washer 2a is mounted just behind the hub of the head. This serves to retain the latch plate in place and also operates as a guard for the strap and the pulley.

rlhe invention having been described, what is claimed as new and useful is:

l. A timer comprising a rotary head, a slide bearing mounted thereon, a brush mounted in the slide bearing and longitudinally movable therein, a reel comprising a grooved pulley and connected hub, a coil spring terminally connected with the hub and a point on the head to impart rotary movement to the hub, and a strap reelcd on the pulley and terminally connected with the brush, the brush at its rear end being provided with a lateral pin with which one extremity of the strap engages and the bearing being provided With a longitudinal slide slot which said pin traverses.

2. A timer Comprising a rotary head, a slide bearing mounted thereon, a brush mounted in the slide bearing `and longitudinally movable therein, a reel comprising a grooved pulley and connected hub, a coil spring terminally Connected With the hub and a point on the head to impart rotary movement to the hub, a strap reeled on the pulley and terminally Connected with the brush, the brush at its rear end being` provided with a lateral pin with whiehone extremity of the strap engages and lthe'bearing being provided with a longitudinal Slide slot which Said pin traverses, the head beingprovided with ahub for mounting on a Cam shaft, and .av guard Washer disposed in abutting relation to the hub and in shielding relation to said strap and the adjacent Side pulley in the unreeled position of the strap.

Intestimony whereof he aixes his signature.

FRANKLIN E. EMERT. 

